Android   发布时间:2022-04-28  发布网站:大佬教程  code.js-code.com
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我正在尝试在我的数据库添加一个表,第一个表已成功创建,并且数据也已成功插入.但是当我试添加一个表,然后插入数据…我得到了这个错误(编译INSERT时没有这样的表….等.

我在谷歌搜索,在这里也在stackoverflow,我发现一些人的代码与我的相似.有人必须添加(onUpgrade方法)到他的代码,所以它将自动增加数据库版本….但我已经写了.我感到很困惑.请帮忙.. ??

这是数据库代码

package group.com;
import android.content.ContentValues;
import android.content.Context;
import android.database.sqlException;
import android.database.sqlite.sqliteDatabase;
import android.database.sqlite.sqliteOpenHelper;
import android.util.Log;

public class DBAdapter {


public static final String KEY_Admin_ROWID = "_id";
public static final String KEY_Admin_fullName = "adminFullName";
public static final String KEY_Admin_UserName = "AdminUserName";
public static final String KEY_Admin_password = "Adminpassword";

private static final String TAG = "DBAdapter";
private static final String DATABASE_NAME = "RamiTariq";

private static final String DATABASE_TABLE = "info";
private static final String DATABASE_TABLE_Admin = "admin";

private static final int DATABASE_VERSION = 1;
private static final String DATABASE_CREATE = "create table "
    + DATABASE_TABLE + " (" + KEY_ROWID
    + " INTEGER PRIMary key autoincrement," 
    + KEY_NAME + " text not null," 
    + KEY_PSSWORD + " text not null," 
    + KEY_F_NAME + " text not null," 
    + KEY_DATE + " text not null," 
    + KEY_JOB + " text not null," 
    + KEY_ADDRESS + " text not null," 
    + KEY_PHONE + " text not null," 
    + KEY_NATIONAL_numbER + " text not null," 
    + KEY_MONEY_SHOULD_PAY + " text null," 
    + KEY_ACTUAL_MONEY + " text null);";


private static final String DATABASE_CREATE_ADMIN = "create table "
    + DATABASE_TABLE_Admin + " (" + KEY_Admin_ROWID
    + " INTEGER PRIMary key autoincrement," 
    + KEY_Admin_fullName + " text not null,"
    + KEY_Admin_UserName + " text not null,"
    + KEY_Admin_password + " text not null);";


private final Context context;
private DatabaseHelper DBHelper;
private sqliteDatabase db;

public DBAdapter(Context ctX) {
    this.context = ctx;
    DBHelper = new DatabaseHelper(context);
}

private static class DatabaseHelper extends sqliteOpenHelper {
    DatabaseHelper(Context context) {
        super(context,DATABASE_NAME,null,DATABASE_version);
    }


    public void onCreate(sqliteDatabase db) {
        try {
            db.execsql(DATABASE_create);
            db.execsql(DATABASE_CREATE_ADMIN);
        } catch (sqlException E) {
            e.printStackTrace();
        }
    }

    public void onUpgrade(sqliteDatabase db,int oldVersion,int newVersion) {
        Log.w(tag,"Upgrading database from version " + oldVersion + " to "
                + newVersion + ",which will destroy all old        data");
        db.execsql("drop table IF EXISTS "+DATABASE_TABLE);
        db.execsql("drop table IF EXISTS "+DATABASE_TABLE_Admin);
        onCreate(db);
    }
}

// ---opens the database---
public DBAdapter open() throws sqlException {
    db = DBHelper.getWritableDatabase();
    return this;
}

// ---closes the database---
public void close() {
    DBHelper.close();
}


//------insert an admin into the database-----
public long insertAdmin(String full_name,String user_name,String password ) {
    ContentValues initialValues = new ContentValues();

    initialValues.put(KEY_Admin_fullName,full_Name);
    initialValues.put(KEY_Admin_UserName,user_name);
    initialValues.put(KEY_Admin_password,password);

    return db.insert(DATABASE_TABLE_Admin,initialValues);
}


  }

这是活动代码

package group.com;

 import android.app.Activity;
 import android.content.Intent;
 import android.os.bundle;
 import android.view.View;
 import android.view.View.onClickListener;
 import android.widget.button;
 import android.widget.EditText;
 import android.widget.Toast;


public class InsertAdmin extends Activity {

DBAdapter db = new DBAdapter(this);

EditText fullName,username,password,repassword;
Button insertAdmin;

public void onCreate(Bundle savedInstanceStatE) {
    super.onCreate(savedInstanceStatE);
    setContentView(R.layout.insertadmin);

    fullName = (EditText) findViewById(R.id.fullName);
    username = (EditText) findViewById(R.id.userName);
    password = (EditText) findViewById(R.id.password);
    repassword = (EditText) findViewById(R.id.repassword);

    insertAdmin = (Button) findViewById(R.id.insertAdmin);

    insertAdmin.setOnClickListener(new OnClickListener() {

        public void onClick(View arg0) {

            String fName = fullName.getText().toString();
            String uName = username.getText().toString();
            String pass = password.getText().toString();
            String rePass = repassword.getText().toString();

            if(fName.length()==0 || uName.length()==0 ||   pass.length()==0 || rePass.length()==0)
            {
                displaymessage("Please Enter Full Data");
                return;
            }

            if (uName.length() == 0)
            {
                displaymessage("Enter username");
                return;
            }
            if (pass.length() == 0)
            {
                displaymessage("Enter The password");
                return;
            }


            if(pass.equals(rePass))
            {
                db.open();
                long id = db.insertAdmin(fName,uName,pass);


                if(id>0)
                {
                    displaymessage(id + "\nsuccessfuly Inserted");

                }
                else
                {
                    displaymessage("Not Inserted");
                }

                db.close();

                startActivity(new Intent(getBaseContext(),Admin.class)) ; 

            }

            else
                displaymessage("Your passwords doesn't match");

        }
    });

}

public void displaymessage(String msg)
{
    Toast.makeText(this,msg,Toast.LENGTH_SHORT).show();
}

  }

解决方法

卸载您的应用程序,以便删除旧版本的数据库.

您的数据库版本仍为1,因此不运行onUpgrade().数据库文件已存在,因此onCreate()不会运行.现有的数据库文件不包含您在当前版本的onCreate()中创建的所有表.

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